[Colonic CT-imaging or virtual coloscopy]

Colorectal cancer (CRC) is the third leading cause of cancer deaths. Various screening tests for colorectal cancer exist, such as occult blood in faeces (Hemoccult), sigmoidoscopy and optical colonoscopy. Each of these methods has limitations. The Hemoccult test is very specific, but insensitive and sigmoidoscopy evaluates a third part of the colon. We consider that colonoscopy is the gold standard for detecting colorectal polyps with the option to perform a biopsy or excision of a polyp. Some limitations apply to this method, including a low complication rate but present. The realization of a scanner frame colic should be an alternative in the context of a screening test for colorectal cancer.